Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 9,570	$ 51,103
Investments	24,928	8,480
Prepaid expenses and other current assets	1,437	779
Total current assets	35,935	60,362
Property and equipment, net	2,428	2,173
Intangible assets, net	4,713	5,213
Goodwill	2,791	2,791
Right-of-use assets	1,190
Other asset	1,645	101
Total assets	48,702	70,640
Current liabilities:
Accounts payable	1,816	1,272
Accrued expenses	2,054	1,421
Deferred rent, current		415
Lease liability, current	177
Total current liabilities	4,047	3,108
Deferred rent, net of current		1,198
Lease liability, net of current	3,674
Total liabilities	7,721	4,306
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $0.001 par value; authorized – 50,000 shares; no shares issued and outstanding
Common stock, $0.001 par value: authorized – 500,000 shares; issued and outstanding – 20,788 shares and 20,593 shares at September 30, 2019 and December 31, 2018, respectively	21	21
Additional paid-in-capital	149,853	142,032
Accumulated other comprehensive income (loss)	8	(1)
Accumulated deficit	(108,901)	(75,718)
Total stockholders' equity	40,981	66,334
Total liabilities and stockholders' equity	$ 48,702	$ 70,640